TPA3116D2 5A Wireless Bluetooth-Compatible Audio Stereo Module, 100W+100W BLE 5.0 AUX Treble/Bass Adjustable Amplifier Board, BT and AUX Inputs for DIY Speakers

ZK-1002T is a high-power Treble/Bass adjustable stereo Bluetooth audio module. Dual channels audio signal output. Built-in amplifier module can connect to loudspeaker directly. It supply Bluetooth music receive and AUX audio input. Password Free Connection.

•     The power supply of the module is very critical. The user must pay enough attention to the power supply. Otherwise it may not work properly. 
•     The higher the voltage and the higher the current then the better the output power. It is better to connect 3~4in speaker if user only have 12V 1A power adapter. It is no problem to connect 8~10in speaker if user have a power adapter which more than 19V 5A.
•     If the voltage is too low, the sound will be distorted after the sound is amplified.
•     If the current is too small, the speaker cannot be driven to work, and the speaker will pull the voltage low, resulting in abnormal operation or poor sound quality.
•     It is recommended to use 18V/19V/24V power supply with current above 5A.
•     Putting the volume to the maximum may be distorted, affecting the sound quality if input low power adapter such as 9V/12V or 1A/2A adapter.

•     Commonly used speakers are generally 4ohm~8ohm.The speaker no need distinguish between positive and negative polarity.
•     It can also work properly if the speaker has low power such as 20W~50W. But it needs connect to low power adapter such as less than 15V to prevent damage to the speaker.
•     User don't have to worry about the problem of the speaker burning out if connect to 100W~200W speaker.Module can connect 12V~24V.The higher the voltage selected, the greater the sound or power that can be output.
•     Speaker power cannot exceed 200W, otherwise it will affect the sound quality.

•     The input power is insufficient.Please change the adapter power supply with higher voltage level.
•     Power supply itself intermittent power-off protection.Please change a match power adapter.
•     The power of the power supply is too large so please reduce the power of the input power.
•     The power amplifier board is seriously heated resulting in trigger overheat protection.So please increase the radiator.

•     Q: The middle BASS potentiometer is used to control the bass. Rotate to the right to enhance the bass. Rotate to the left to attenuate the bass.When the potentiometer is in the middle position, the bass is not enhanced or attenuated.
•     The left TREBLE potentiometer is used to control the treble. Rotate to the right to enhance the treble. Rotate to the left to attenuate the treble.When the potentiometer is in the middle position, the treble is not enhanced or attenuated.
•     Pay attention to the adjustment of high and low bass: when the treble or bass is adjusted to the right to close to the maximum, if the sound is distorted, it means that the gain of the treble or bass adjustment is too large.The user needs to turn the treble or bass potentiometer to the left to lower the gain or turn the VOLUME potentiometer to the left to reduce the total volume.

ICStation doesn't accept any form of pay on delivery. Items used to be shipped after payment. Below are the payment methods we can accept at the moment:

1) Paypal Payment

PayPal is a secure and trusted payment processing service that allows you to shop online. PayPal can be used at icstation.com to purchase items by Credit Card (Visa, MasterCard, Discover, and American Express), Debit Card , or E-check (i.e. using your regular Bank Account). 

We are PayPal Verified 

2)  Bank Transfer / Wire Transfer / T/T

Bank Transfer / Wire Transfer / T/T payment methods are accepted for orders which the total price is up to US$300. The bank will charge about US$50 for the transfer fee if we do the payment in these ways. Feel free to contact us for bank payment details if you need pay via bank.

For other payment method, please contact us at orders@icstation-team.com for more details.

We offer worldwide FREE shipping for all orders over $20 USD! Below are the details for our different shipping methods:

1. Regular Shipping: Yanwen / YunExpress / 4PX / China Post Airmail Service

(1) Shipping Fee: $3~$5

All orders will be shipped via standard normal post with tracking number service, which can be tracked on our website.

Note:

1.Shipping fee to USA, Australia, Newzealand is $3 usd. The other countries need $5 usd.

2.Any order (from any country) price is more than $20 USD, you won't need to pay the $3~$5 USD registered shipping fee.

(2) Delivery Time

Most countries can expect delivery within 7-20 business days, depending on your location:

7-15 working days: Most of Asia countries

10-16 working days: USA, Canada, Australia, UK, Most of Europe countries

20-40 working days: Brazil, Most of South America countries

Important: Since 2021, sellers outside the EU must provide an IOSS VAT number and pay for the VAT billing monthly to ship to EU countries. Therefore, we charge the VAT fee in advance for EU customers. Rest assured, they will not be charged the VAT fee again when the package arrives.

2. Express Shipping: DHL / FedEx / UPS

(1) Shipping Fee: Free for orders that meet the following requirements:

Total price of the order is over $200 USD

Note:

1. For European countries, please provide Tax/EORI Number when you need this shipping.

2. Any import tax/duties fees are on buyer's side. We are not responsible for it.

(2) Delivery Time

Most countries can expect delivery within 7-10 working days:

Asia: Japan, South Korea, Malaysia, Singapore, Thailand, Vietnam, Cambodia, Indonesia, Philippines

Oceania: Australia, New Zealand, Papua New Guinea

Europe & America: Belgium, Britain, Denmark, Finland, Greece, Ireland, Italy, Luxembourg, Malta, Norway, Portugal, Switzerland, Germany, Sweden, France, Spain, USA, Austria, Canada

Important Notes:

1.Please provide a physical address for order delivery since DHL and FedEx cannot deliver items to APO or PO BOX addresses.

2.The recipient's contact phone number is required by express shipping agencies for package delivery.

3.EU customers must provide a VAT and EORI number for express shipping. If you can't provide either number, consider using regular post shipping.

4.Korean customers must provide CNEE'S PCCC or date of birth for custom clearance when using express shipping.

5.Brazilian customers must provide the CNPJ or CPF number for custom clearance when using express shipping.

6.For Taiwan customers, we default to the ShunYou Post courier. If you need Express S.F. Shipping, please provide one of the following:

Taiwan local ID card (such as A+9 digits)

Passport

Local residence permit

Company name and Unified Business No.

Other Important Information

7.Delivery Time of mixed orders with items in different Shipping Status should be calculated using the longest estimate times listed.

8. During annual Chinese holidays (e.g. Chinese New Year, Chinese National Day), delivery for orders placed around these times may be delayed by 3-7 days.

9.Once your order is shipped, you will receive an email notification from icstation.com.

10. For tracking your order with a tracking number, please visit the following websites:

Regular shipping: www.17track.net/en

4PX: en.4px.com/

DHL: www.dhl.com

FedEx: www.fedex.com

We hope this information helps you understand our shipping and delivery policies. If you have any further concern, feel free to contact us via email orders@icstation-team.com, thanks for your attention.